/* ── ROZEMARIJN VAN DIJK — shared stylesheet ── */

:root {
  --green-dark:   #2d6a4f;
  --green-mid:    #40916c;
  --green-accent: #52b788;
  --green-pale:   #d8f3dc;
  --text:         #111827;
  --text-muted:   #4b5563;
  --text-light:   #9ca3af;
  --bg:           #ffffff;
  --bg-subtle:    #f9fafb;
  --border:       #e5e7eb;
  --max-w:        780px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── BILINGUAL ── */
body.lang-en .nl { display: none !important; }
body.lang-nl .en { display: none !important; }

/* ── NAV ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.93);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: 1rem;
}
.nav-brand {
  font-weight: 600; font-size: 1rem;
  color: var(--text); letter-spacing: -0.01em;
  text-decoration: none; flex-shrink: 0;
}
.nav-links { display: flex; gap: 1.8rem; list-style: none; }
.nav-links a {
  font-size: 0.88rem; color: var(--text-muted);
  text-decoration: none; transition: color 0.15s;
}
.nav-links a:hover { color: var(--green-dark); }
.nav-links a.active { color: var(--green-dark); font-weight: 500; }

/* Language toggle */
.lang-toggle {
  display: flex; align-items: center;
  gap: 0; border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
  flex-shrink: 0;
}
.lang-toggle button {
  background: none; border: none;
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem; font-weight: 500;
  font-family: inherit;
  color: var(--text-muted); cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-toggle button:first-child { border-right: 1px solid var(--border); }
.lang-toggle button.active { background: var(--green-dark); color: #fff; }
.lang-toggle button:hover:not(.active) { background: var(--bg-subtle); }

/* ── LAYOUT ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.page-content { padding: 4rem 0 5rem; }

/* ── PAGE TITLE (subpages) ── */
.page-title {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.15;
}
.page-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

/* ── SECTION LABEL ── */
.section-label {
  font-size: 0.72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--text-light); margin-bottom: 2rem;
}

/* ── LINKS ── */
a.green { color: var(--green-mid); text-decoration: none; font-weight: 500; }
a.green:hover { text-decoration: underline; }

/* ── BUTTON ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.85rem; font-weight: 500;
  padding: 0.48rem 1.1rem; border-radius: 6px;
  background: var(--green-dark); color: #fff;
  text-decoration: none; transition: background 0.15s;
  font-family: inherit;
}
.btn:hover { background: var(--green-mid); }

/* ── TAGS ── */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-size: 0.76rem; font-weight: 500;
  padding: 0.24rem 0.7rem; border-radius: 999px;
  background: var(--bg-subtle); border: 1px solid var(--border);
  color: var(--text-muted);
}
/* All topic tags: uniform green style */
.tag.gender, .tag.candidate, .tag.violence,
.tag.party, .tag.media, .tag.electoral, .tag.other {
  border-color: var(--green-accent);
  background: #fff;
  color: var(--green-dark);
}

/* Clickable tag filter */
.tag-filter .tag {
  cursor: pointer; transition: opacity 0.15s, transform 0.1s;
  user-select: none;
}
.tag-filter .tag:hover { opacity: 0.8; }
.tag-filter .tag.active { box-shadow: 0 0 0 2px currentColor; }

/* ── CALLOUT ASIDES (bird, conferences) ── */
.bird-aside {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.5rem 0.85rem;
  background: var(--green-pale);
  border: 1px solid var(--green-accent);
  border-radius: 6px;
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.6;
}
.bird-aside a { color: var(--green-dark); text-decoration: none; font-weight: 500; }
.bird-aside a:hover { text-decoration: underline; }

/* ── FOOTER ── */
footer {
  padding: 2rem; text-align: center;
  font-size: 0.78rem; color: var(--text-light);
  border-top: 1px solid var(--border);
}

/* ── MOBILE ── */
@media (max-width: 640px) {

  /* Nav: wrap into two rows */
  nav {
    height: auto;
    flex-wrap: wrap;
    padding: 0.6rem 1rem;
    gap: 0.4rem;
  }
  .nav-brand { flex: 1; }
  .nav-links {
    order: 3;
    width: 100%;
    gap: 0.9rem;
    padding: 0.4rem 0 0.2rem;
    flex-wrap: wrap;
  }
  .nav-links a { font-size: 0.83rem; }

  /* Tighter container */
  .container { padding: 0 1.1rem; }
  .page-content { padding: 2.5rem 0 3.5rem; }
  .page-title { font-size: 1.5rem; }

  /* Bird asides: full width */
  .bird-aside { display: block; width: 100%; }
}

@media (max-width: 640px) {
  /* Homepage: edu grid → single column */
  .edu-inline { grid-template-columns: 1fr !important; gap: 1.5rem; }

  /* Homepage: page-cards → single column */
  .page-cards { grid-template-columns: 1fr !important; }

  /* Homepage: hero */
  #home { padding-top: 2rem; padding-bottom: 2.5rem; }

  /* Research: dissertation layout → stack */
  .diss-layout { flex-direction: column !important; }
  .diss-sidebar { width: 100% !important; max-width: 180px; }

  /* Conferences: table → readable */
  .conf-table { font-size: 0.82rem; }
  .conf-table th, .conf-table td { padding: 0.5rem 0.4rem; }
}